One thing that I've noticed only recently is open ageism.
I employ 23 people, 4 of whom are over 60. Three clients have openly suggested not only to me, but to the staff themselves that they "should retire".
How rude and inappropriate is that?
I reminded all three of them that there's something called "Human Rights", and that they would get there(the age of the staff they were insulting) faster than they could imagine.
I think it's disappointing to be dismissed by people who haven't experienced a quarter of what life will throw to them.